Treatment of iron ore to increase recovery through the use of low molecular weight polyacrylate dispersants
OwnerGlenn Lillmarsinventor
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Abstract
The described invention relates to the processing of iron ore, particularly taconite ore. In particular, the invention relates to the separation of the iron containing component from the silicious and other gangue components such as phosphorus compounds in low grade iron ore. Typically, the separation is accomplished by a flotation process to remove the gangue to recover the iron component.
Claims60
A process for treating an aqueous iron containing ore slurry comprising a source of iron oxide and gangue including the steps of contacting the iron containing ore slurry with an effective amount of a dispersant polymer or copolymer containing at least one acrylic functional group having a molecular weight of 1,000 to less than about 10,000, and grinding the dispersant and iron containing ore slurry to a desired particle size and thereafter adding a selective flocculant for the iron oxide to the ground ore slurry and subjecting the flocculant containing ground ore slurry having said dispersant and iron oxide therein to a settling or decanting separating step to cause the iron oxide to settle and the gangue is decanted and removed as overflow.
A method for separating an iron containing component from a silicate component including the steps of forming an aqueous mixture of the iron containing component and the silicate component, adding thereto an effective amount of a dispersant polymer or copolymer containing an acrylic functional group having a molecular weight of 1,000 to less than about 10,000, and a selective flocculant for the iron containing component;
- and subjecting the flocculant and dispersant containing aqueous mixture to a settling or decanting separation step to cause the iron containing component to settle and be removed in an underflow and the silicate component is decanted and removed as a overflow.
A method for separating an iron containing component from a phosphorous component including the steps of forming an aqueous mixture of the iron containing component and the phosphorous component, adding thereto an effective amount of a dispersant polymer or copolymer containing an acrylic functional group having a molecular weight of 1,000 to less than about 10,000 and a flocculant for the iron containing component, and subjecting the flocculant and dispersant containing aqueous mixture to a settling or decanting separation step to cause the iron containing component to settle and be removed in an underflow and the phosphorous component is decanted and removed as an overflow.
A method for separating hematite from a member selected from the group consisting of a silicate component and a phosphorous containing component including the steps of grinding a taconite ore in the presence of water to obtain an aqueous mixture of hematite adding thereto an effective amount of a dispersant polymer or copolymer containing an acrylic functional group having a molecular weight of 1,000 to less than 10,000 and a flocculant for the hematite, and subjecting the flocculant and dispersant containing aqueous mixture to a settling or decanting separation step to cause the hematite to settle and be removed in an underflow and the silicate component is decanted and removed as an overflow.
Dependencies are inferred from the claim text.